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Line 1: − + − ====Introduction==== − =====The Problem===== − SME will automatically mount connected USB disk drives into the /media folder. − Auto-mounting will be performed based both the specific USB port used to connect your drives and the order in which they are connected unless you use another method to specify mount points. − − Imagine this example: − * Connect USB 'A' to your system. It is automatically assigned to /dev/sdc and auto-mounted to /media/usbdisk − * Disconnect USB 'A' and connect USB 'B' (to the same or to a different USB port). It will be assigned to /dev/sdc and auto-mounted to /media/usbdisk. − * Re-connect USB 'A' while USB 'B' is still connected, and it will be assigned to /dev/sdd and auto-mounted to /media/usbdisk1. − − Or this example: − * Connect USB 'A' to the second USB port on your SME. It is assigned to /dev/sdc − * Connect USB 'B' to the first USB port without disconnecting USB 'A'. USB 'B' is assigned to /dev/sdd − * Leave both drives connected and re-boot. USB 'B' is now connected to /dev/sdc, while USB 'A' is connected to /dev/sdd! − − In one case, SME automatically mounted my USB drive in /media/DiskLabel, but, since the resulting automatic entry in /etc/fstab depended on the assigned device, the next drive I connected was also mounted in /media/DiskLabel, even though it had a completely different label! − − =====The Solution===== − The easiest way to avoid this behavior and provide reliable mount points for your USB drives is to label each drive, then specify the desired mount point in /etc/fstab based on the drive label. This will allow you to: − * Reliably mount your USB drives to drive-specific directories regardless of what device is assigned to the drive by SME. This would allow you to specify separate USB disks for specific ibays by using lines like these in /etc/fstab:<br> − LABEL=Disk1 /home/e-smith/files/ibays/ibay-1/html ext3 defaults − LABEL=Disk2 /home/e-smith/files/ibays/ibay-2/html ext3 defaults − * Reliably mount multiple disks in the one location, in case you want to use a rotating set of disk drives for backups, by using lines like these in /etc/fstab (just don't connect two of these drives at the same time!):<br> − LABEL=Disk1 /media/backup ext3 defaults − LABEL=Disk2 /media/backup ext3 defaults − LABEL=Disk3 /media/backup ext3 defaults − − + Line 39:
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Gave better formatting to echo output in script.
===USB Disks===
===USB Disks===
{{Warning box|NTFS partitions are not supported, please use either fat32/vfat or ext2/ext3}}
{{Warning box|NTFS partitions are supported if you install ntfs-3g and ntfsprogs, please use either fat32/vfat or ext2/ext3/ext4}}
====Supported FileSystems====
====Supported FileSystems====
=====ext2/ext3=====
=====ext2/ext3/ext4=====
<ol>
<ol>
<li> recommended for USB drives intended for use only on SME
<li> recommended for USB drives intended for use only on SME
dumpe2fs -h /dev/sdc1
dumpe2fs -h /dev/sdc1
</li></ol>
</li></ol>
=====NTFS=====
You can format and use the NTFS if you install from [[epel]] ntfs-3g and ntfsprogs
See the complete features of [https://en.wikipedia.org/wiki/NTFS-3G ntfs-3g]
yum install ntfs-3g ntfsprogs --enablerepo=epel
=====fat32/vfat=====
=====fat32/vfat=====
====Identifying your USB drive====
====Identifying your USB drive====
See [[USBDisks#USB_on_SME_8|USB_on_SME_8]] for SME 8 servers.
After connecting your USB drive, execute the command
After connecting your USB drive, execute the command
mount
mount
====Formatting your USB drive====
====Formatting your USB drive====
=====ext2/ext3=====
=====ext2/ext3/ext4=====
<ol></li><li>Copied with slight changes from [[Affa#Alternatively_setup_a_USB_drive]]
<ol></li><li>Copied with slight changes from [[Affa#Alternatively_setup_a_USB_drive]]
</li><li>Connect a USB hard disk to the USB Bus. Now you must determine what device the kernel has assigned to the drive. View the /var/log/message and search for ''Initializing USB Mass Storage driver''. A few lines below you'll find the name of the device. In this example it is ''sdc''. Replace ''/dev/sdc'' by ''your device'' in following instructions.
</li><li>Connect a USB hard disk to the USB Bus. Now you must determine what device the kernel has assigned to the drive. View the /var/log/message and search for ''Initializing USB Mass Storage driver''. A few lines below you'll find the name of the device. In this example it is ''sdc''. Replace ''/dev/sdc'' by ''your device'' in following instructions.
Use the fdisk program to create a linux partition
Use the fdisk program to create a linux partition
fdisk /dev/sdc
fdisk /dev/sdc
You'll most likely find an existing vfat dos partition, which you have to delete first. In the following we assume, that you have created a single partition ''/dev/sdc1''.
You'll most likely find an existing vfat dos partition, which you have to delete first. Refer to http://wiki.contribs.org/AddExtraHardDisk#Partitioning_the_disk for steps to create a partition. In the following we assume, that you have created a single partition ''/dev/sdc1''.
</li><li>Now format the drive with an ext3 filesystem
</li><li>Now format the drive with an ext3 filesystem
mkfs.ext3 -L MyLabel /dev/sdc1
mkfs ext3 -L MyLabel /dev/sdc1
</li><li>or format the drive with an ext4 filesystem
mkfs ext4 -L MyLabel /dev/sdc1
</li><li>Make the mount point
</li><li>Make the mount point
mkdir -p /media/affadevice
mkdir -p /media/usbdevice
</li><li>Customize /etc/fstab as shown here: [[USBDisks#Customizing_fstab|Customizing fstab]]
</li><li>Customize /etc/fstab as shown here: [[USBDisks#Customizing_fstab|Customizing fstab]]
</li><li>Mount the drive
</li><li>Mount the drive
mount reads /etc/fstab to look for instructions on what to do if not specifically told on the command line. After updating /etc/fstab as recommended, you can "mount" your USB disk reliably by specifying either the target directory:
mount reads /etc/fstab to look for instructions on what to do if not specifically told on the command line. After updating /etc/fstab as recommended, you can "mount" your USB disk reliably by specifying either the target directory:
mount /media/affadevice
mount /media/usbdevice
or the disk label:
or the disk label:
mount LABEL=MyLabel
mount LABEL=MyLabel
You can format your drive from your SME server using
You can format your drive from your SME server using
mkfs.vfat -n MyLabel /dev/sdd1
mkfs.vfat -n MyLabel /dev/sdd1
Since this command will '''destroy irretrievably''' all information on the specified device (/dev/sdd1 in this case), be very sure you know exactly which device is the drive you want to format!
=====NTFS=====
You can format and use the NTFS if you install from [[epel]] ntfs-3g and ntfsprogs
yum install ntfs-3g ntfsprogs --enablerepo=epel
then
mkfs.ntfs -n MyLabel /dev/sdd1
Since this command will '''destroy irretrievably''' all information on the specified device (/dev/sdd1 in this case), be very sure you know exactly which device is the drive you want to format!
Since this command will '''destroy irretrievably''' all information on the specified device (/dev/sdd1 in this case), be very sure you know exactly which device is the drive you want to format!
Only required if you didn't label your drive using the previous section.
Only required if you didn't label your drive using the previous section.
=====ext2/ext3=====
=====ext2/ext3/ext4=====
e2label /dev/sdd1 MyLabel
e2label /dev/sdd1 MyLabel
=====fat32/vfat=====
=====fat32/vfat=====
'''mtools'''
'''mtools'''
* Replace 'ext3' with 'vfat' if your drive is formatted as fat32/vfat.
* Replace 'ext3' with 'vfat' if your drive is formatted as fat32/vfat.
* Replace 'ext3' with 'ext4' if your drive is formatted as ext4.
* Replace /media/affadevice with the folder in which you want your USB drive mounted (here and in all "mount" commands)
* Replace /media/affadevice with the folder in which you want your USB drive mounted (here and in all "mount" commands)
* Make sure that the mount directory (/media/affadevice in this example) exists and is empty! Linux will not mount a drive in a directory that is not empty.
* Make sure that the mount directory (/media/affadevice in this example) exists and is empty! Linux will not mount a drive in a directory that is not empty.
* Add multiple entries as described in [[USBDisks#The_Solution]] to meet your specific requirements.
* Add multiple entries as described in [[USBDisks#The_Solution]] to meet your specific requirements.
Or for ntfs
/dev/NTFS-partition /media/affadevice ntfs-3g defaults 0 0
====Mount your disk automatically at boot-up====
====Mount your disk automatically at boot-up====
Once the script exists you can add additional mount commands by editing S95mount_USB using:
Once the script exists you can add additional mount commands by editing S95mount_USB using:
nano -w /etc/e-smith/events/local/S95mount_USB
The 'local' event will run each time your server boots up. If you connect or disconnect a drive and need to re-mount it you can re-run your auto-mount commands using:
The 'local' event will run each time your server boots up. If you connect or disconnect a drive and need to re-mount it you can re-run your auto-mount commands using:
signal-event local
signal-event local
====Mount your disks automatically when connected====
====Mount your disks automatically when connected====
{{incomplete}}
{{incomplete}}
|Please edit this section to specify how to get SME to automatically mount USB drives when they are connected
|Please edit this section to specify how to get SME to automatically mount USB drives when they are connected
====Format limitations when linking disk to an ibay====
If you wish to mount an external USB drive, and then add a link in a ibay to that drive, then in order to change ownership and have write access you must format the drive as ext3 only. Refer this forum thread for info
http://forums.contribs.org/index.php?topic=40240.new;topicseen#new
====More Information====
====More Information====
* There is a contrib for managing USB disks:<br>http://forums.contribs.org/index.php?topic=35466.0
* There is a contrib for managing USB disks:<br>http://forums.contribs.org/index.php?topic=35466.0
* There is evidence that some external USB enclosures are incompatible with SME:<br> http://forums.contribs.org/index.php?topic=39114.msg178646#msg178646
* There is evidence that some external USB enclosures are incompatible with SME:<br> http://forums.contribs.org/index.php?topic=39114.msg178646#msg178646
* Darrell May's HowTo on scrubbing and re-formatting a USB disk:<br> http://distro.ibiblio.org/pub/linux/distributions/smeserver/contribs/dmay/smeserver/7.x/smeserver-usb-disk-howto.htm
* Darrell May's HowTo on scrubbing and re-formatting a USB disk:<br> http://distro.ibiblio.org/pub/linux/distributions/smeserver/contribs/dmay/smeserver/7.x/smeserver-usb-disk-howto.htm
====USB on SME 8====
Things change on SME 8
: It's difficult to work out what your device name is ie /dev/sda1
: The mount point isn't automatically added in /etc/fstab
We use hal for the first and manually create and mount for the second
=====Find the Drive Name=====
To find the device name, label, filesystem and the uid
Create the file hal-find-by-property.sh
nano hal-find-by-property.sh
paste the text below into the file and save it.
#! /bin/bash
hal-find-by-property --key volume.fsusage --string filesystem |
while read udi ; do
# ignore optical discs
if test [[ "$(hal-get-property --udi $udi --key volume.is_disc)" == "false" ]]; then
dev=$(hal-get-property --udi $udi --key block.device)
fs=$(hal-get-property --udi $udi --key volume.fstype)
lb=$(hal-get-property --udi $udi --key volume.label)
echo device: $dev", label: "$lb", file system: "$fs", uid: "$udi
fi
done
Make the file executable.
chmod +x hal-find-by-property.sh
Run the file with the USB drive attached and read the output of the file from the terminal.
sh hal-find-by-property.sh
The output will tell you the device, volume label, file system type, and the uid. If this is a new drive you have to run fdisk to create a partition and format the drive before you can mount it.
=====Run fdisk on the Drive=====
To create a partition with fdisk, use the device output from the hal-find-by-property.sh script as the argument to the fdisk command. If the output from hal-find-by-property.sh is /dev/sdb1 the fdisk command will be
fdisk /dev/sdb1
You can list the partitions on the disk by entering the p command when prompted. It's a good idea to see what partitions exist before you start. If the drive is pre-formatted for fat or ntfs it's good practice to delete the factory partitions.
If this is a new drive, you will need to create a new primary partition. Do this by entering an n at the prompt followed by p for primary. Enter a partition number of 1. fdisk will then ask for the first and last sector. If you are formatting a new disk, hit enter at both questions. This will use the entire disk. When the process ends, hit p to verify you have the disk setup like you want it. Once you are happy with the partition table, hit w to write the partition table and exit fdisk.
=====Format The Drive=====
You now need to format the drive. To format the drive with an ext3 filesystem located at /dev/sdb1 and give it a label of usbdrive, issue the following command:
mkfs.ext3 -L usbdrive /dev/sdb1
=====Mount The Drive=====
Finally you mount the drive. As mentioned before, the mount point has to exist before you issue the mount command. A typical place for USB drives to be mounted is /media. If there is already a mount point in /media you can check it by listing the directory contents of media.
ll /media
Once you have a suitable location, make sure nothing is mounted there by issuing the mount command from the terminal with no arguments. If you wanted to mount the drive /dev/sdb1 at /media/usbdrive, you would issue the following command
mount /dev/sdb1 /media/usbdrive
ls -lh /media/usbdrive/
=====UnMount the Drive=====
Unmount the drive before unplugging it with
umount /dev/sdb1
Note: When configuring a USB drive to be used by the built in [[SME_Server:Documentation:Administration_Manual:Chapter10|Workstation Backup To USB]] you must ensure that the drive is not mounted automatically. When configuring the Workstation Backup, it will look for unmounted removable drives and allow you to select what you want. If the drive is already mounted when you configure it then you will get an error saying "No Removable disk available".
The same applies for the [[SME_Server:Documentation:Administration_Manual:Chapter6#Option_8:_Perform_backup_to_USB_device|Console Backup to USB]]
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[[Category:Howto]]
[[Category:Howto]]
[[Category:Administration:Storage]]
